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Oct 26, 2020 at 8:01 comment added Pietro Majer You don't ask that U be dense in the compactification, do you?
Oct 26, 2020 at 3:06 history edited Ali Taghavi CC BY-SA 4.0
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Oct 22, 2020 at 17:20 comment added Ali Taghavi @InfiniteLooper Yes the interval is another compactification of the disjoint union of two copies of $\mathbb{R}$. Me too I belive that $\mathbb{N} \cup \{\infty \}$ is not a somewhat connected space since its only open dense subset is N which consist if isolated point.
Oct 22, 2020 at 17:09 comment added InfiniteLooper However $\mathbb N$ is not SC
Oct 22, 2020 at 17:07 comment added InfiniteLooper $[0,1]$ is a compactification of your set, isnt it ?
Oct 22, 2020 at 15:04 comment added Ali Taghavi @LSpice I am not sure but my initial guess is $\{0\} \cup \{1,1/2,\ldots1/n,\ldots\}$.
Oct 22, 2020 at 14:11 comment added LSpice What is an example of a non-SC space?
Oct 22, 2020 at 13:15 history edited YCor CC BY-SA 4.0
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Oct 22, 2020 at 11:59 history asked Ali Taghavi CC BY-SA 4.0